The over-locknut dimension (OLD) for tandems has steadily increased over the years to the present where there are two standards, 160mm for Santana and 145mm for everyone else. 145mm hubs build significantly stronger wheels than the earlier standards. Back when that Peugeot was new, folks riding tandems would experience more broken spokes than flat tires, on average. This is because the narrower OLD hubs have the flanges closer together, so the bracing angle of the spokes is less, which stresses the spokes more. So I would never want to cold set a frame to a *narrower* dimension, if anything I would widen it to 145 if possible. If you don't want to spread it that much, then by all means get a true 135mm hub, because that wheel will be stronger than either the 130 or 126 wheels listed above in this thread. Don't add spacers to a 130 to make it fit, if you do that you still have the weaker 130 flange spacing.